Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2016	Mar. 31, 2016
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 4,048	$ 4,344
Accumulated Amortization	(3,229)	(3,442)
Net Carrying Amount	$ 819	$ 902
Weighted-Average Remaining Useful Life	18 years 9 months 18 days	18 years 10 months 24 days
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 2,636	$ 2,829
Accumulated Amortization	(2,636)	(2,829)
Brands Associated with Acquired Cell Lines [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	544	583
Accumulated Amortization	(120)	(125)
Net Carrying Amount	$ 424	$ 458
Weighted-Average Remaining Useful Life	31 years 1 month 6 days	31 years 4 months 24 days
Product Licenses [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 697	$ 748
Accumulated Amortization	(302)	(304)
Net Carrying Amount	$ 395	$ 444
Weighted-Average Remaining Useful Life	5 years 8 months 12 days	5 years 10 months 24 days
Other Intangibles Assets [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 171	$ 184
Accumulated Amortization	$ (171)	$ (184)